Does TW18 flood?

Yes — parts of the TW18 district carry real flood risk: 162 of its 631 at-risk postcodes reach the Environment Agency's High likelihood band. The TW18 postcode district covers Staines, Riverside and Laleham, Staines South, Egham Hythe, close to Laleham, Hythe End, Chertsey, and surrounding villages in parts of Surrey and Greater London.

631 postcodes in the TW18 district appear in the Environment Agency's rivers-and-sea flood-risk dataset — worst bands: 162 high, 141 medium, 251 low, 77 very low. A postcode not listed here has no properties in any recorded risk band (which is good news, but never proof it cannot flood).

Free preview first · full report £19

Which TW18 postcodes are at risk?

TW18 1AD up to High TW18 1AJ up to High TW18 1AP up to High TW18 1DS up to High TW18 1FA up to High TW18 1HH up to High TW18 1RX up to High TW18 1SB up to High TW18 1SS up to High TW18 1SX up to High TW18 1UA up to High TW18 1UQ up to High TW18 1XD up to High TW18 1YA up to High TW18 2AP up to High TW18 2AW up to High TW18 2AZ up to High TW18 2DA up to High TW18 2DE up to High TW18 2DL up to High TW18 2DX up to High TW18 2ED up to High TW18 2EE up to High TW18 2EL up to High TW18 2HA up to High TW18 2HD up to High TW18 2HF up to High TW18 2HG up to High TW18 2HH up to High TW18 2HT up to High TW18 2HU up to High TW18 2HX up to High TW18 2JH up to High TW18 2LE up to High TW18 2LW up to High TW18 2NA up to High TW18 2ND up to High TW18 2NE up to High TW18 2NF up to High TW18 2NG up to High TW18 2NX up to High TW18 2NY up to High TW18 2PA up to High TW18 2PD up to High TW18 2PE up to High TW18 2PF up to High TW18 2PG up to High TW18 2PH up to High TW18 2PJ up to High TW18 2PQ up to High TW18 2PW up to High TW18 2QJ up to High TW18 2QR up to High TW18 2QS up to High TW18 2QW up to High TW18 2RP up to High TW18 2RR up to High TW18 2RW up to High TW18 2SL up to High TW18 2SX up to High TW18 2SZ up to High TW18 2TA up to High TW18 2TB up to High TW18 2TE up to High TW18 3AD up to High TW18 3AE up to High TW18 3AF up to High TW18 3AG up to High TW18 3AP up to High TW18 3BA up to High TW18 3DB up to High TW18 3DD up to High TW18 3DE up to High TW18 3DF up to High TW18 3DG up to High TW18 3DQ up to High TW18 3DU up to High TW18 3DW up to High TW18 3EH up to High TW18 3EJ up to High TW18 3EP up to High TW18 3ER up to High TW18 3ES up to High TW18 3ET up to High TW18 3EU up to High TW18 3EW up to High TW18 3EX up to High TW18 3EY up to High TW18 3EZ up to High TW18 3FA up to High TW18 3HB up to High TW18 3HE up to High TW18 3HG up to High TW18 3HH up to High TW18 3HN up to High TW18 3HR up to High TW18 3HT up to High TW18 3HU up to High TW18 3HW up to High TW18 3HX up to High TW18 3JF up to High TW18 3JH up to High TW18 3JJ up to High TW18 3JL up to High TW18 3JN up to High TW18 3JS up to High TW18 3JT up to High TW18 3JU up to High TW18 3JX up to High TW18 3JY up to High TW18 3LA up to High TW18 3LB up to High TW18 3LD up to High TW18 3LF up to High TW18 3LG up to High TW18 3LH up to High TW18 3LJ up to High TW18 3LL up to High TW18 3LN up to High TW18 3LP up to High TW18 3LQ up to High TW18 3LR up to High TW18 3LS up to High TW18 3LT up to High TW18 3LU up to High TW18 3LW up to High TW18 3LX up to High TW18 3LY up to High TW18 3LZ up to High TW18 3NB up to High TW18 3ND up to High TW18 3NF up to High TW18 3NG up to High TW18 3NH up to High TW18 3NJ up to High TW18 3NL up to High TW18 3NP up to High TW18 3NQ up to High TW18 3NW up to High TW18 3NZ up to High TW18 4BU up to High TW18 4EN up to High TW18 4EP up to High TW18 4RZ up to High TW18 4SD up to High TW18 4SP up to High TW18 4SU up to High TW18 4SY up to High TW18 4TG up to High TW18 4TS up to High TW18 4TT up to High TW18 4TU up to High TW18 4TX up to High TW18 4TY up to High TW18 4TZ up to High TW18 4UA up to High TW18 4UW up to High TW18 4XE up to High TW18 4XZ up to High TW18 4YD up to High TW18 4YE up to High TW18 4YZ up to High TW18 1AG up to Medium TW18 1AN up to Medium TW18 1AR up to Medium TW18 1EJ up to Medium TW18 1EL up to Medium TW18 1QR up to Medium TW18 1QS up to Medium TW18 1QT up to Medium TW18 1QU up to Medium TW18 1QX up to Medium TW18 1QY up to Medium TW18 1QZ up to Medium TW18 1RB up to Medium TW18 1RR up to Medium TW18 1RS up to Medium TW18 1RT up to Medium TW18 1RU up to Medium TW18 1RW up to Medium TW18 1XH up to Medium TW18 2AB up to Medium TW18 2AN up to Medium TW18 2AX up to Medium TW18 2AY up to Medium TW18 2DS up to Medium TW18 2EN up to Medium TW18 2EX up to Medium TW18 2HB up to Medium TW18 2HQ up to Medium TW18 2JA up to Medium TW18 2JJ up to Medium TW18 2JL up to Medium TW18 2JX up to Medium TW18 2JY up to Medium TW18 2JZ up to Medium TW18 2LA up to Medium TW18 2LB up to Medium TW18 2LD up to Medium TW18 2LR up to Medium TW18 2NB up to Medium TW18 2NP up to Medium TW18 2NQ up to Medium TW18 2NS up to Medium TW18 2NT up to Medium TW18 2NU up to Medium TW18 2PL up to Medium TW18 2PN up to Medium TW18 2PP up to Medium TW18 2PR up to Medium TW18 2PS up to Medium TW18 2PU up to Medium TW18 2PX up to Medium TW18 2QB up to Medium TW18 2QF up to Medium TW18 2QG up to Medium TW18 2QH up to Medium TW18 2QL up to Medium TW18 2QQ up to Medium TW18 2QU up to Medium TW18 2QX up to Medium TW18 2QZ up to Medium TW18 2RA up to Medium TW18 2RB up to Medium TW18 2RN up to Medium TW18 2RS up to Medium TW18 2RT up to Medium TW18 2SA up to Medium TW18 2SD up to Medium TW18 2SE up to Medium TW18 2SF up to Medium TW18 2SG up to Medium TW18 2SH up to Medium TW18 2SP up to Medium TW18 2SQ up to Medium TW18 2SR up to Medium TW18 2SS up to Medium TW18 2ST up to Medium TW18 2SU up to Medium TW18 2TD up to Medium TW18 2TF up to Medium TW18 3AL up to Medium TW18 3AQ up to Medium TW18 3AR up to Medium TW18 3AS up to Medium TW18 3AT up to Medium TW18 3AU up to Medium TW18 3AW up to Medium TW18 3AX up to Medium TW18 3AY up to Medium TW18 3AZ up to Medium TW18 3BF up to Medium TW18 3BG up to Medium TW18 3BU up to Medium TW18 3BX up to Medium TW18 3DA up to Medium TW18 3DH up to Medium TW18 3DJ up to Medium TW18 3DP up to Medium TW18 3DZ up to Medium TW18 3EB up to Medium TW18 3ED up to Medium TW18 3EE up to Medium TW18 3EF up to Medium TW18 3EG up to Medium TW18 3EQ up to Medium TW18 3FD up to Medium TW18 3HD up to Medium TW18 3HF up to Medium TW18 3HJ up to Medium TW18 3HQ up to Medium TW18 3JA up to Medium TW18 3JE up to Medium TW18 3JQ up to Medium TW18 4AE up to Medium TW18 4DP up to Medium TW18 4EA up to Medium TW18 4PG up to Medium TW18 4PH up to Medium TW18 4PJ up to Medium TW18 4PQ up to Medium TW18 4PR up to Medium TW18 4PT up to Medium TW18 4PW up to Medium TW18 4QA up to Medium TW18 4QB up to Medium TW18 4QF up to Medium TW18 4RB up to Medium TW18 4RP up to Medium TW18 4SJ up to Medium TW18 4TB up to Medium TW18 4TP up to Medium TW18 4TW up to Medium TW18 4WB up to Medium TW18 4XL up to Medium TW18 4YA up to Medium TW18 4YP up to Medium TW18 4YR up to Medium TW18 4YT up to Medium TW18 4YX up to Medium TW18 4YY up to Medium TW18 4ZB up to Medium TW18 6EG up to Medium TW18 1AB up to Low TW18 1AH up to Low TW18 1AQ up to Low TW18 1AT up to Low TW18 1AW up to Low TW18 1BD up to Low TW18 1BG up to Low TW18 1BN up to Low TW18 1BY up to Low TW18 1DD up to Low TW18 1DF up to Low TW18 1DG up to Low TW18 1DH up to Low TW18 1DJ up to Low TW18 1DL up to Low TW18 1DN up to Low TW18 1DP up to Low TW18 1DQ up to Low TW18 1DR up to Low TW18 1DW up to Low TW18 1EA up to Low TW18 1EH up to Low TW18 1EN up to Low TW18 1EP up to Low TW18 1EQ up to Low TW18 1ER up to Low TW18 1ES up to Low TW18 1ET up to Low TW18 1EW up to Low TW18 1FB up to Low TW18 1GN up to Low TW18 1HB up to Low TW18 1HD up to Low TW18 1HE up to Low TW18 1HF up to Low TW18 1HG up to Low TW18 1HQ up to Low TW18 1HR up to Low TW18 1HS up to Low TW18 1JN up to Low TW18 1JP up to Low TW18 1JR up to Low TW18 1JS up to Low TW18 1JT up to Low TW18 1JU up to Low TW18 1JW up to Low TW18 1JX up to Low TW18 1JZ up to Low TW18 1LX up to Low TW18 1LY up to Low TW18 1LZ up to Low TW18 1NA up to Low TW18 1NB up to Low TW18 1ND up to Low TW18 1NF up to Low TW18 1NG up to Low TW18 1NH up to Low TW18 1NQ up to Low TW18 1PA up to Low TW18 1PB up to Low TW18 1PE up to Low TW18 1PF up to Low TW18 1PG up to Low TW18 1PH up to Low TW18 1PJ up to Low TW18 1PL up to Low TW18 1PN up to Low TW18 1PP up to Low TW18 1PQ up to Low TW18 1PR up to Low TW18 1PS up to Low TW18 1PT up to Low TW18 1PW up to Low TW18 1PX up to Low TW18 1QF up to Low TW18 1QG up to Low TW18 1QJ up to Low TW18 1QL up to Low TW18 1QN up to Low TW18 1QP up to Low TW18 1QQ up to Low TW18 1QW up to Low TW18 1RP up to Low TW18 1RY up to Low TW18 1RZ up to Low TW18 1SE up to Low TW18 1SJ up to Low TW18 1TA up to Low TW18 1UB up to Low TW18 1UF up to Low TW18 1XB up to Low TW18 2AA up to Low TW18 2AE up to Low TW18 2AF up to Low TW18 2AG up to Low TW18 2AH up to Low TW18 2AJ up to Low TW18 2AQ up to Low TW18 2AU up to Low TW18 2BA up to Low TW18 2BB up to Low TW18 2BD up to Low TW18 2BW up to Low TW18 2BX up to Low TW18 2BY up to Low TW18 2DH up to Low TW18 2DJ up to Low TW18 2DN up to Low TW18 2DU up to Low TW18 2DW up to Low TW18 2DY up to Low TW18 2DZ up to Low TW18 2EA up to Low TW18 2EB up to Low TW18 2EH up to Low TW18 2EJ up to Low TW18 2EP up to Low TW18 2EQ up to Low TW18 2ES up to Low TW18 2EW up to Low TW18 2EY up to Low TW18 2FA up to Low TW18 2FB up to Low TW18 2HE up to Low TW18 2HN up to Low TW18 2HP up to Low TW18 2HS up to Low TW18 2HY up to Low TW18 2JD up to Low TW18 2JF up to Low TW18 2JT up to Low TW18 2JU up to Low TW18 2LF up to Low TW18 2LG up to Low TW18 2LH up to Low TW18 2LJ up to Low TW18 2LL up to Low TW18 2LN up to Low TW18 2LQ up to Low TW18 2NR up to Low TW18 2NW up to Low TW18 2QA up to Low TW18 2QD up to Low TW18 2QE up to Low TW18 2QT up to Low TW18 2QY up to Low TW18 2RD up to Low TW18 2RU up to Low TW18 2SB up to Low TW18 2SJ up to Low TW18 2SN up to Low TW18 2SW up to Low TW18 2SY up to Low TW18 3FB up to Low TW18 3HS up to Low TW18 3HZ up to Low TW18 3JB up to Low TW18 3JD up to Low TW18 4AB up to Low TW18 4AG up to Low TW18 4AH up to Low TW18 4AS up to Low TW18 4BB up to Low TW18 4BD up to Low TW18 4BL up to Low TW18 4BN up to Low TW18 4BY up to Low TW18 4DE up to Low TW18 4DF up to Low TW18 4DR up to Low TW18 4EQ up to Low TW18 4EW up to Low TW18 4EY up to Low TW18 4HA up to Low TW18 4HN up to Low TW18 4HR up to Low TW18 4HS up to Low TW18 4HT up to Low TW18 4HU up to Low TW18 4HZ up to Low TW18 4JH up to Low TW18 4JT up to Low TW18 4JW up to Low TW18 4JZ up to Low TW18 4LA up to Low TW18 4LB up to Low TW18 4LG up to Low TW18 4LH up to Low TW18 4LN up to Low TW18 4LP up to Low TW18 4LQ up to Low TW18 4LR up to Low TW18 4LS up to Low TW18 4LT up to Low TW18 4LU up to Low TW18 4LW up to Low TW18 4LX up to Low TW18 4NB up to Low TW18 4NE up to Low TW18 4NF up to Low TW18 4NH up to Low TW18 4NJ up to Low TW18 4NL up to Low TW18 4NP up to Low TW18 4NQ up to Low TW18 4NR up to Low TW18 4NS up to Low TW18 4NU up to Low TW18 4NW up to Low TW18 4PA up to Low TW18 4PB up to Low TW18 4PD up to Low TW18 4QD up to Low TW18 4QJ up to Low TW18 4QL up to Low TW18 4QP up to Low TW18 4QX up to Low TW18 4QZ up to Low TW18 4RH up to Low TW18 4RJ up to Low TW18 4RL up to Low TW18 4RR up to Low TW18 4RS up to Low TW18 4RT up to Low TW18 4RU up to Low TW18 4RX up to Low TW18 4RY up to Low TW18 4SH up to Low TW18 4SN up to Low TW18 4SW up to Low TW18 4TD up to Low TW18 4TN up to Low TW18 4UP up to Low TW18 4UQ up to Low TW18 4US up to Low TW18 4XH up to Low TW18 4XP up to Low TW18 4XR up to Low TW18 4XS up to Low TW18 4XT up to Low TW18 4YG up to Low TW18 4YH up to Low TW18 4YU up to Low TW18 4YW up to Low TW18 4ZN up to Low TW18 4ZR up to Low TW18 4ZS up to Low TW18 4ZT up to Low TW18 4ZU up to Low TW18 4ZW up to Low TW18 4ZX up to Low TW18 1AA up to Very low TW18 1AE up to Very low TW18 1AS up to Very low TW18 1AU up to Very low TW18 1AX up to Very low TW18 1AY up to Very low TW18 1AZ up to Very low TW18 1BA up to Very low TW18 1BB up to Very low TW18 1BH up to Very low TW18 1BJ up to Very low TW18 1BL up to Very low TW18 1BP up to Very low TW18 1BT up to Very low TW18 1BU up to Very low TW18 1BX up to Very low TW18 1BZ up to Very low TW18 1DA up to Very low TW18 1DB up to Very low TW18 1DE up to Very low TW18 1DZ up to Very low TW18 1ED up to Very low TW18 1GA up to Very low TW18 1HX up to Very low TW18 1HY up to Very low TW18 1HZ up to Very low TW18 1JA up to Very low TW18 1JB up to Very low TW18 1JD up to Very low TW18 1JE up to Very low TW18 1JF up to Very low TW18 1JG up to Very low TW18 1JH up to Very low TW18 1JJ up to Very low TW18 1JL up to Very low TW18 1JQ up to Very low TW18 1JY up to Very low TW18 1LH up to Very low TW18 1LJ up to Very low TW18 1LP up to Very low TW18 1LS up to Very low TW18 1LT up to Very low TW18 1LU up to Very low TW18 1LW up to Very low TW18 1NE up to Very low TW18 1PD up to Very low TW18 1TB up to Very low TW18 1TD up to Very low TW18 1XS up to Very low TW18 2BN up to Very low TW18 2BT up to Very low TW18 2BU up to Very low TW18 4AX up to Very low TW18 4BP up to Very low TW18 4BW up to Very low TW18 4DD up to Very low TW18 4DN up to Very low TW18 4EJ up to Very low TW18 4EZ up to Very low TW18 4HB up to Very low TW18 4HD up to Very low TW18 4HF up to Very low TW18 4HG up to Very low TW18 4HY up to Very low TW18 4JG up to Very low TW18 4JL up to Very low TW18 4JN up to Very low TW18 4JX up to Very low TW18 4LY up to Very low TW18 4LZ up to Very low TW18 4ND up to Very low TW18 4NG up to Very low TW18 4NT up to Very low TW18 4NZ up to Very low TW18 4QN up to Very low TW18 4RN up to Very low TW18 4RW up to Very low

Rivers and flooding history near TW18

The rivers that matter here, each monitored live on FloodRadar:

364 official flood warnings and alerts have been raised within ~10 km of the district's centre since 2006 (136 at warning level or above), most recently 15 March 2026. Warnings cover flood areas, not individual addresses.

Recorded flood extents near the district (Environment Agency record):

Records, not floods: no outline on the record is not evidence a place has not flooded.

🏠 Buying or renting in TW18? The full property flood-risk report covers any postcode here — the official likelihood band, every recorded flood nearby with distances, warning history year by year, how the local rivers behave, and an insurance outlook, print-ready for £19. See what's in the report →

Flood risk in nearby postcode districts

TW17 TW19 TW16 TW20 TW15 TW14 TW13 TW12

Band = the worst likelihood band of any property in that postcode (EA Risk of Flooding from Rivers & Sea, defence-adjusted, area-level). Check any postcode in detail — or get the full £19 property report — at the property flood-risk report. © Environment Agency copyright and/or database right 2025. All rights reserved. Some features of this map are based on digital spatial data from the Centre for Ecology & Hydrology, © NERC (CEH). © Crown Copyright and Database Rights 2025 OS AC0000807064. This product is produced in part from PAF® and Multiple Residence Data, the copyright in which is owned by Royal Mail Group Limited and/or Royal Mail Group plc. All rights reserved. Licence number AC0000807064.